Laplandite-(Ce)
A valid IMA mineral species
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About Laplandite-(Ce)
Formula:
Na4CeTiPO4Si7O18 · 5H2O
Colour:
Gray-white, pale yellow, pale blue
Lustre:
Vitreous, Greasy
Hardness:
2 - 3
Specific Gravity:
2.83
Crystal System:
Orthorhombic
Name:
For Lappland (Lapland), the region in which the Kola Peninsula lies.
This page provides mineralogical data about Laplandite-(Ce).
Unique Identifiers
Mindat ID:
2331
Long-form identifier:
mindat:1:1:2331:9
GUID
(UUID V4):
(UUID V4):
71009346-82e3-46df-9dbe-c4f68d5127ce
IMA Classification of Laplandite-(Ce)
Approved
IMA Formula:
Na4CeTiPSi7O22 · 5H2O
First published:
1974
Classification of Laplandite-(Ce)
9.DJ.10
9 : SILICATES (Germanates)
D : Inosilicates
J : Inosilicates with 4-periodic double and triple chains
9 : SILICATES (Germanates)
D : Inosilicates
J : Inosilicates with 4-periodic double and triple chains
78.7.9.1
78 : Unclassified Silicates
7 :
78 : Unclassified Silicates
7 :
17.6.10
17 : Silicates Containing other Anions
6 : Silicates with phosphate
17 : Silicates Containing other Anions
6 : Silicates with phosphate
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Lpl-Ce | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Laplandite-(Ce)
Vitreous, Greasy
Transparency:
Transparent, Translucent
Colour:
Gray-white, pale yellow, pale blue
Hardness:
2 - 3 on Mohs scale
Fracture:
Splintery
Density:
2.83 g/cm3 (Measured) 2.71 g/cm3 (Calculated)
Optical Data of Laplandite-(Ce)
Type:
Biaxial (-)
RI values:
nα = 1.568 nβ = 1.584 nγ = 1.585
2V:
Measured: 28° , Calculated: 26°
Max Birefringence:
δ = 0.017
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong
Chemistry of Laplandite-(Ce)
Mindat Formula:
Na4CeTiPO4Si7O18 · 5H2O
Crystallography of Laplandite-(Ce)
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pmmm
Setting:
Pmmm
Cell Parameters:
a = 7.27 Å, b = 14.38 Å, c = 22.25 Å
Ratio:
a:b:c = 0.506 : 1 : 1.547
Unit Cell V:
2,326.07 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Radial-fibrous aggregates.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.27 Å | (100) |
| 3.76 Å | (100) |
| 3.35 Å | (100) |
| 3.03 Å | (100) |
| 3.36 Å | (80) |
| 2.80 Å | (80) |
| 6.47 Å | (70) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Laplandite-(Ce)
General Appearance of Type Material:
Radiating-fibrous deposits up to 0.5-1 cm and fan-shaped platy aggregates; the plates about 0.01 mm thick are flattened on the c axis.
Place of Conservation of Type Material:
Institute of Mineralogy and Geochemistry of Rare Elements, Moscow, Russia.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 75512, 76312.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 75512, 76312.
Geological Setting of Type Material:
Natrolite zone of a pegmatite in a differentiated alkalic massif.
Associated Minerals at Type Locality:
Reference:
Es’kova, E.M., Semenov, E.I., Khomyakov, A.P., Kazakova, M.E., Sidorenko, O.V. (1974) Laplandite, a new mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 103(5): 571-575.
Synonyms of Laplandite-(Ce)
Other Language Names for Laplandite-(Ce)
German:Laplandit-(Ce)
Simplified Chinese:硅钛铈钠石
Related Minerals - Strunz-mindat Grouping
| 9.DJ.05 | Narsarsukite | Na4(Ti,Fe)2[Si8O20](O,OH,F)2 |
| 9.DJ.15 | Caysichite-(Y) | (Ca,Yb,Er)4Y4(Si8O20)(CO3)6(OH) · 7H2O |
| 9.DJ.20 | Seidite-(Ce) | Na4(Ce,Sr)2[TiSi8O18(OH)2](O,OH,F)4 · 5H2O |
| 9.DJ.25 | Carlosturanite | (Mg,Fe,Ti)21(Si,Al)12O28(OH)34 · H2O |
| 9.DJ.30 | Jonesite | Ba4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Laplandite-(Ce)
mindat.org URL:
https://www.mindat.org/min-2331.html
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References for Laplandite-(Ce)
Reference List:
Localities for Laplandite-(Ce)
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
China | |
| Fengjun Nie et al. (2013) |
Russia (TL) | |
| Es’kova et al. (1974) +1 other reference |
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Yubileinaya pegmatite, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia